Invention Grant
- Patent Title: Clock data recovery apparatus
- Patent Title (中): 时钟数据恢复装置
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Application No.: US11819807Application Date: 2007-06-29
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Publication No.: US07826583B2Publication Date: 2010-11-02
- Inventor: Chun-Seok Jeong , Jae-Jin Lee , Chang-Sik Yoo , Jung-June Park , Young-Suk Seo
- Applicant: Chun-Seok Jeong , Jae-Jin Lee , Chang-Sik Yoo , Jung-June Park , Young-Suk Seo
- Applicant Address: KR Gyeonggi-do
- Assignee: Hynix Semiconductor Inc.
- Current Assignee: Hynix Semiconductor Inc.
- Current Assignee Address: KR Gyeonggi-do
- Agency: IP & T Group LLP
- Priority: KR10-2006-0106144 20061031
- Main IPC: H03D3/24
- IPC: H03D3/24 ; H04L7/00 ; H04L25/00 ; H04L25/40

Abstract:
A clock data recovery apparatus includes a phase looked loop unit, a voltage control delay line, a phase detection unit, a charge pump unit, and a loop filter unit. The phase looked loop unit outputs a plurality of clock signals which are different from each other in phase and of which frequency is lower than that of data. The voltage control delay line outputs recovered clock signals by delaying the clock signals according to input voltage levels. The phase detection unit outputs recovered data in synchronization with the clock signals, respectively and outputs increment and decrement signals which have wider pulse width than the data by comparing the recovered clock signals with the data. The charge pump unit outputs a corresponding current in response to the increment and decrement signals. The loop filter unit determines an amount of delay in the voltage control delay line by outputting the voltage.
Public/Granted literature
- US20080101524A1 Clock data recovery apparatus Public/Granted day:2008-05-01
Information query
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